KR102105588B1 - Fuel cell seperator comprising embossing structre for uniform distribution of gas and fuel cell stack comprising thereof - Google Patents

Abstract

According to an embodiment of the present invention, a separation plate for a high temperature polymer electrolyte film fuel cell comprises: a first inlet unit for receiving a first reaction gas; a first outlet unit for discharging the first reaction gas; a first reaction surface located between the first inlet unit and the first outlet unit; a second inlet unit for receiving a second reaction gas; a second outlet unit for discharging the second reaction gas; and a second reaction surface located between the second inlet unit and the second outlet unit, wherein the first reaction surface includes a plurality of first linear channels through which the first reaction gas flows, and a first branch unit for uniformly branching the first reaction gas to the first linear channels from the first inlet unit through a plurality of protrusions each having a long shape in a direction orthogonal to the first linear channels may be arranged between the first inlet unit and the first reaction surface.

Description

FUEL CELL SEPERATOR COMPRISING EMBOSSING STRUCTRE FOR UNIFORM DISTRIBUTION OF GAS AND FUEL CELL STACK COMPRISING THEREOF}

The following description relates to a fuel cell separator including a thin plate-based embossing structure for uniform gas distribution and a fuel cell including the same.

Fuel cells have the advantages of high efficiency, eco-friendliness, high power density, etc., and are attracting much attention as a promising future clean energy technology. There are a number of reasons why the existing low-temperature polymer electrolyte membrane fuel cell (LT-PEMFC) suffers from commercialization difficulties. In order to operate the low temperature polymer electrolyte membrane fuel cell, a water management system such as a humidifier and a moisture trap is required. In addition, there is a difficulty in supplying fuel and the disadvantage of using hydrogen having a low concentration of certain impurities, and the heat obtained through the operation of a low temperature polymer electrolyte membrane fuel cell has a low array temperature, so its use is limited. As an alternative to the low-temperature polymer electrolyte membrane fuel cell, research on a high-temperature polymer electrolyte membrane fuel cell (HT-PEMFC) has been actively conducted. The high-temperature polymer electrolyte membrane fuel cell can be operated without additional humidification using a polybenzimidazole (PBI) -based electrolyte membrane doped with phosphoric acid, and water generated through the operation of the fuel cell is generated in vapor form. No moisture trap is required. In addition, the performance degradation of the membrane electrode assembly (MEA) due to poisoning of CO at a high temperature polymer electrolyte membrane fuel cell at an operating temperature of 150 to 180 ° C. is significantly reduced, resulting in resistance to CO concentration of 3%. Due to this phenomenon, it is possible to minimize the CO removal process in the water introduction process. In addition, it is possible to obtain a high array temperature close to 100 ° C, which makes the utilization of thermal energy high.

However, high temperature polymer electrolyte membrane fuel cells still require a lot of technology development. In theory, it has a high electrochemical reaction rate, but the performance of the actually developed high-temperature polymer electrolyte membrane fuel cell is somewhat less than that of the low-temperature polymer electrolyte membrane fuel cell. In addition, due to the exposure to phosphoric acid and harsh operating conditions at high temperatures, durability is weak and short life span.

For example, when a part of the fuel cell is damaged under high-temperature operating conditions, the coolant penetrates into the membrane electrode assembly (MEA), thereby deteriorating the performance of the fuel cell stack. In addition, since the oil used as a refrigerant in the high-temperature polymer electrolyte membrane fuel cell stack has a higher viscosity than water, the oil causes a high pressure differential on the circulation path, and this has also been a problem that causes damage to the fuel cell. In addition, in the case of the high-temperature polymer electrolyte membrane fuel cell stack, since the internal temperature variation is more severe than that of the low-temperature polymer electrolyte membrane fuel cell stack, there is a problem in that performance, deterioration degree, and lifetime of the fuel cell stack vary greatly depending on temperature management.

In addition, the most obstacle to the commercialization of the high temperature polymer electrolyte membrane fuel cell (HT-PEMFC) is paradoxically high temperature heat. When looking at the heat distribution of the high temperature polymer electrolyte membrane fuel cell, it is possible to frequently find a phenomenon in which the temperature at the center of the stack is relatively high and a region in which high heat is generated locally occurs. This is a phenomenon that occurs because heat generated by the electrochemical reaction does not escape and accumulates, which is a major cause of deterioration and durability degradation of stacked components, including membrane electrode assemblies (MEAs).

The purpose of the embodiment is to reduce the overall volume of the fuel cell stack by using a thin plate-shaped thin separator, improve the cooling effect by a stand-alone cooling plate, and provide a channel with a simple structure, while providing excellent processability and uniform distribution of gas. It is to provide a separation plate having a structure that can be and a fuel cell stack including the same.

The separator for a high temperature polymer electrolyte membrane fuel cell according to an embodiment includes a first inlet portion receiving a first reaction gas, a first discharge portion discharging the first reaction gas, a first inlet portion and a first discharge portion A first reaction surface located between, a second inlet receiving a second reaction gas, a second discharge part for discharging the second reaction gas, and a second agent located between the second inlet part and the second discharge part 2 including a reaction surface, the first reaction surface includes a plurality of first linear channels through which the first reaction gas flows, and between the first inlet and the first reaction surface, each of the first linear channels A first branching portion for uniformly branching the first reaction gas from the first inlet to the plurality of first straight channels may be disposed through a plurality of protrusions having a long shape in an orthogonal direction to.

The first branch part is formed adjacent to the first inlet part based on the longitudinal direction of the first straight channel, and is spaced apart in a direction perpendicular to the longitudinal direction of the first straight channel, thereby providing a plurality of first ports. A plurality of first port side protrusions forming a side gap; And a first reaction surface formed closer to the first reaction surface than the first port-side protrusion based on the lengthwise direction of the first linear channel, and spaced apart in a direction perpendicular to the longitudinal direction of the first linear channel. It includes a plurality of first channel-side protrusions forming a channel-side gap, and each length of the plurality of first channel-side protrusions may be shorter than the length of the first port-side protrusion adjacent thereto.

The width of the plurality of first channel side gaps may be constant.

The length of the plurality of first port-side protrusions may decrease as the distance from the center of the first inlet portion to a direction perpendicular to the longitudinal direction of the first linear channel increases.

The width of the plurality of first port-side gaps may decrease as the distance from the center of the first inlet portion to a direction perpendicular to the longitudinal direction of the first linear channel increases.

The first branch portion is formed between the plurality of first port-side protrusions and the plurality of first channel-side protrusions based on the longitudinal direction of the first linear channel, and is perpendicular to the longitudinal direction of the first linear channel. Further comprising a plurality of first intermediate-side protrusions spaced apart in one direction to form a plurality of first intermediate-side gaps, each length of the plurality of first intermediate-side protrusions is a length of a first port-side protrusion adjacent thereto. It can be shorter.

The number of the plurality of first port-side gaps, the plurality of first intermediate-side gaps, and the plurality of first channel-side gaps may increase sequentially from the first inlet toward the first reaction surface.

The width of each of the plurality of first intermediate-side gaps may be smaller than the width of the first port-side gap closest thereto and larger than the width of the first channel-side gap closest thereto.

The plurality of first middle side protrusions may include: a first main middle side protrusion completely overlapping a gap adjacent to the first port when viewed in a longitudinal direction of the first straight channel; And a first sub-middle side protrusion that completely overlaps the adjacent first port side protrusion when viewed in the longitudinal direction of the first straight channel.

The length of the first sub middle side protrusion may be shorter than the length of the first main middle side protrusion.

The plurality of first channel-side protrusions may include: a first main channel-side protrusion that completely overlaps a first intermediate side gap when viewed in a longitudinal direction of the first straight channel; And a first sub-channel-side protrusion completely overlapping the adjacent first intermediate-side protrusion when viewed in the longitudinal direction of the first straight channel.

When looking in the longitudinal direction of the first straight channel, at least two or more first sub-channel-side protrusions may overlap with any one of the plurality of first intermediate-side protrusions.

The first inlet portion may include a plurality of first inlet side protrusions that allow the first reaction gas to be divided into a plurality of forks and flow to the first branch portion.

The second reaction surface is parallel to the plurality of first straight channels, and includes a plurality of second straight channels through which the second reaction gas flows, between the second inlet and the second reaction surface, respectively A second branch is arranged to uniformly branch the second reaction gas from the second inlet to the plurality of second straight channels through a plurality of projections having a long shape in a direction orthogonal to the second straight channel. , The plurality of first straight channels and the plurality of second straight channels do not overlap each other in the thickness direction of the separation plate, and the plurality of protrusions of the first branch portion and the plurality of protrusions of the second branch portion are The separation plates may not overlap each other in the thickness direction.

The first reaction gas is air, the second reaction gas is hydrogen, and the width of the plurality of first linear channels through which the air flows is greater than the width of the plurality of second linear channels through which the hydrogen flows. You can.

The first reaction gas is air, the second reaction gas is hydrogen, and the distance from the first inlet to the closest of the plurality of protrusions of the first branch is the second to the second inlet. It may be closer than the distance to the closest protrusion among the plurality of protrusions of the branch.

According to an embodiment, the high temperature polymer electrolyte membrane fuel cell stack includes: a plurality of cell units including a plurality of separator plates and a plurality of membrane electrode assemblies respectively disposed between the plurality of separator plates; And a plurality of first independent cooling plates disposed on upper surfaces of the plurality of cell units, and a plurality of second independent cooling plates disposed on lower surfaces of the plurality of cell units, and the plurality of cooling units. Each of the separation plates includes a first reaction surface having a plurality of first straight channels; A second reaction surface located on the opposite side to the first reaction surface and having a plurality of second straight channels; It is formed on the inlet or outlet of the plurality of first linear channels so that a first reaction gas flows uniformly to the plurality of first linear channels, and has a plurality of elongated shapes in a direction orthogonal to the first linear channel. First projection; And a plurality of second straight channels formed in the inlet or outlet of the plurality of second straight channels so that the second reaction gas flows uniformly, and having a long shape in a direction orthogonal to the second straight channels. It may include a second projection of the dog.

According to an embodiment of the present invention, a method of manufacturing a separator for a high temperature polymer electrolyte membrane fuel cell includes preparing a thin plate; Forming a first reaction surface including a plurality of parallel first straight channels in a central portion of the thin plate; And a plurality of agents having an elongated shape in a direction orthogonal to the first linear channel at an inlet or outlet of the plurality of first linear channels so that a first reaction gas flows uniformly to the plurality of first linear channels. It may include the step of forming a protrusion.

The method includes forming a second reaction surface including a plurality of parallel second straight channels on a surface opposite to the first reaction surface; And a plurality of agents having an elongated shape in a direction orthogonal to the second linear channel at an inlet or outlet of the plurality of second linear channels so that a second reaction gas flows uniformly to the plurality of second linear channels. 2 may further include forming a protrusion.

The plurality of first linear channels and the plurality of second protrusions are formed simultaneously by pressing the thin plate in one direction, and the plurality of second linear channels and the plurality of first protrusions are the plurality of first linear channels And at positions where the plurality of second protrusions do not overlap each other, the thin plates may be simultaneously formed by pressing in the opposite direction of the one direction.

In preparing the thin plate, a composite carbon material having conductivity formed by impregnating an epoxy-based resin with a carbon material may be used.

According to one embodiment, a channel through which two kinds of reaction gases (hydrogen and air) can flow may be formed on both sides of the thin plate by using an embossing structure on one thin plate.

According to an embodiment, instead of a complex shaped meandering channel on the reaction surface, a plurality of straight channels parallel to each other may be arranged to reduce the differential pressure between the inlet and the outlet of the reaction gas.

According to one embodiment, by forming a distribution structure using a straight channel and a plurality of rod shapes perpendicular to it, it is possible to improve the workability of the separator. As a result, according to an embodiment, the separation plate may be manufactured using not only a metal thin plate having no restrictions on processability, but also a carbon thin plate having poor processability.

According to one embodiment, the gas may be uniformly flowed through the length and position of the plurality of rod shapes.

According to one embodiment, by reducing the thickness of the separator, in a high temperature polymer electrolyte membrane fuel cell using one independent cooling plate for each of the plurality of separators, cooling efficiency may be improved.

According to one embodiment, in the case of a fuel cell for a house and a building, a thick carbon separator is used instead of a metal separator having a short life because it is vulnerable to corrosion. And it is expected to have a significant effect on system miniaturization and production cost reduction.

1 is a front view of a high temperature polymer electrolyte membrane fuel cell stack according to an embodiment.
2 is a view showing a support assembly constituting a high-temperature polymer electrolyte membrane fuel cell stack according to an embodiment.
3 is a view showing a cell unit and a cooling plate constituting a high temperature polymer electrolyte membrane fuel cell stack according to an embodiment.
4 is a top view of an end plate according to an embodiment.
5 is a top view of a first standalone cooling plate according to an embodiment.
6 is a top view of a second independent cooling plate according to an embodiment.
7 is a view showing a disassembled cell unit according to an embodiment.
8 is a view showing the surface of the cathode channel side of the separator according to the embodiment.
9 is a view showing the surface of the anode channel side of the separator according to the embodiment.
10A is a partially enlarged view of FIG. 8.
10B is a cross-sectional view taken along line II of FIG. 10A.
11A is a partially enlarged view of FIG. 9.
11B is a cross-sectional view taken along line II-II of FIG. 11A.
12 is a flowchart illustrating a method of manufacturing a separator according to an embodiment.
13 is a flowchart illustrating a pressing step according to an embodiment.

Hereinafter, embodiments will be described in detail through exemplary drawings. It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing the embodiments, when it is determined that detailed descriptions of related well-known configurations or functions interfere with understanding of the embodiments, detailed descriptions thereof will be omitted.

In addition, in describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to the other component, but another component between each component It should be understood that may be "connected", "coupled" or "connected".

Components included in any one embodiment and components including a common function will be described using the same name in other embodiments. Unless there is an objection to the contrary, the description described in any one embodiment may be applied to other embodiments, and a detailed description will be omitted in the overlapped range.

1 is a front view of a high temperature polymer electrolyte membrane fuel cell stack according to an embodiment, FIG. 2 is a view showing a support assembly constituting a high temperature polymer electrolyte membrane fuel cell stack according to an embodiment, and FIG. 3 is a high temperature according to an embodiment This is a view showing a cell unit and a cooling plate constituting the polymer electrolyte membrane fuel cell stack. FIG. 3 is a view in which the clamping bar 112 is omitted from part A of FIG. 1.

4 is a top view of an end plate according to an embodiment, FIG. 5 is a top view of a first independent cooling plate according to an embodiment, and FIG. 6 is a top view of a second independent cooling plate according to an embodiment.

7 is a view showing a disassembled cell unit according to an embodiment.

1 to 7, a high temperature polymer electrolyte membrane fuel cell stack (hereinafter referred to as “high temperature PEMFC stack”) according to an embodiment includes a support assembly 11, a cell unit 12, and a cooling assembly ( 13) and a current collector 14 to provide the produced current to the outside.

The support assembly 11 can support the plurality of cell units 12 and the cooling assembly 13. The support assembly 11 may include an end plate 110, a middle end plate 111, a clamping bar 112 and a relief spring 113.

The end plates 110 are plates that are fastened to both ends of the high-temperature PEMFC stack 10, and can press other components disposed between the two end plates 110. The end plate 110 includes a first refrigerant inlet port 1102 through which a first refrigerant inlet passage 132 for guiding refrigerant flowing into the first cooling plate 131 passes, and a first cooling plate 131. The first refrigerant discharge port 1103 through which the first refrigerant discharge passage 133 for guiding the refrigerant discharged from passes, and the second refrigerant inlet passage for guiding the refrigerant flowing into the second cooling plate 134 ( A second refrigerant discharge port 1106 through which a second refrigerant discharge passage 136 for guiding refrigerant discharged from the second cooling plate 134 passes, and a second refrigerant inlet port 1105 through which 135 passes. , Anode inlet port (A_in) for guiding hydrogen flowing into the cell unit 12, cathode inlet port (C_in) for guiding air flowing into the cell unit 12, and discharged from the cell unit 12 The anode discharge port (A_out) for guiding the hydrogen to be discharged, and discharged from the cell unit 12 May comprise a cathode discharge port (C_out) and a clamping bar clamping hole (h) is 112, for guiding the air to pass therethrough.

The end plate 110 may have a rectangular shape, for example, for optimal space utilization. In this case, a first refrigerant inlet port 1102 and a first refrigerant discharge port 1103 are formed on one side of the end plate 110, and the second refrigerant inlet port 1105 and the second refrigerant are discharged on the other side. Port 1106 may be formed. For example, the first refrigerant inlet port 1102 and the first refrigerant outlet port 1103 may be disposed on sides facing the second refrigerant inlet port 1105 and the second refrigerant outlet port 1106. .

The plurality of clamping holes h may be spaced apart along the edge of the end plate 110. The clamping hole h is, for example, one for each corner of the end plate 110, and may be disposed at least one between the corners.

The middle end plate 111 is a plate disposed at the center of the two end plates 110, and thus the fixing force can be further improved. The high-temperature PEMFC stack 10 has a greater degree of thermal expansion than the low-temperature PEMFC stack due to the characteristics of operating at a high temperature. Therefore, the risk that the separator constituting the cell unit 12 is damaged by thermal expansion increases. In order to prevent the above problems, the thickness of the separator may be increased. On the other hand, if the separation plate becomes thick, it is difficult to fix it with only two end plates 110, and by further inserting the middle end plate 111 in the center, the fixing force can be improved.

The clamping bar 112 is fastened between two end plates 110, or fastened between each end plate 110 and the middle end plate 111, whereby the components located between the two end plates 110 Can be fixed. The clamping bar 112 is arranged to penetrate at least some of the components located between the two end plates 110, so that the components can be correctly aligned.

The relief spring 113 is provided at the end of the clamping bar 112 to apply pressure to the two end plates 110 or configurations located between each end plate 110 and the middle end plate 111. Can be applied. By adjusting the position and length of the relief spring 113, a constant pressure distribution can be applied to the separation plate constituting the cell unit 12.

Each cell unit 12 includes a plurality of separator plates S, a plurality of membrane electrode assemblies M respectively disposed between the plurality of separator plates S, and both surfaces of each membrane electrode assembly M. It may include a gasket (G1, G2) disposed in. For example, the cell unit 12 may include five separation plates S and gaskets G1 and G2 and a membrane electrode assembly M positioned between each pair of adjacent separation plates S. have. In an embodiment, the cell unit 12 may be understood to be an aggregate such as a separation plate S located between two cooling plates 131 and 134. A plurality of cell units 12 may be stacked in the vertical direction. Depending on the number of cell units 12, the output of the entire high temperature PEMFC stack 10 can be determined.

Each of the separating plates S constituting the cell unit 12 includes a first surface on which a cathode channel through which air flows (S1, see FIG. 8) and a second surface on which an anode channel through which hydrogen flows is formed. (S2, see FIG. 9). Here, it can be understood that the first surface S1 and the second surface S2 correspond to both surfaces of the thin plate. In addition, each separation plate S may not include a refrigerant channel through which the refrigerant flows. As described below, the cooling function may be performed through the cooling assembly 13 using the independent cooling plate instead of forming the refrigerant channel in the cell unit 12. Meanwhile, a first gasket G1 and a second gasket G2 corresponding to each surface are disposed on the first surface S1 and the second surface S2, and the first gasket G1 and A membrane electrode assembly M may be disposed between the second gaskets G2.

The cooling assembly 13 is for removing heat generated in the high-temperature PEMFC stack 10, and can remove heat generated in the cell unit 12 by flowing the refrigerant in an external manifold method. In consideration of the thickness of the separation plate constituting the cell unit 12, instead of inserting a cooling plate between each separation plate so that the entire stack 10 is not too thick, a cell unit composed of a plurality of separation plates ( Cooling plates 131 and 134 may be inserted into the upper and lower surfaces of 12), respectively.

The cooling assembly 13 guides a plurality of first independent cooling plates 131 and a plurality of first independent cooling plates 131 respectively disposed on the upper surfaces of the plurality of cell units 12. The first refrigerant inflow passage 132, the first refrigerant discharge passage 133 for guiding refrigerant discharged from the plurality of first independent cooling plates 131, and the lower surfaces of the plurality of cell units 12, respectively A plurality of second independent cooling plates 134, a second refrigerant inflow passage 135 for guiding refrigerant flowing into the plurality of second independent cooling plates 134, and a plurality of second independent cooling plates 134 ) May include a second refrigerant discharge passage 136 for guiding refrigerant discharged from each.

Each material of the first independent cooling plate 131 and the second independent cooling plate 134 may be formed of a metal material having a higher strength than the material of the cell unit 12, for example, SUS metal. In this case, since the mechanical strength is higher than that of the existing cooling plate, it is possible to prevent the problem that the cooling plate is damaged even under high temperature operating conditions.

In the conventional case, an internal manifold-type cooling structure is formed by integrally forming a cooling channel in the interior of the separation plate, but the cooling channel is damaged due to high temperature operating conditions, thereby leaking refrigerant and deteriorating performance. On the other hand, as the separator, a graphite plate made of a mixture of a porous medium and engineering plastics filling the porous medium may be used. In this case, the low-temperature PEMFC stack is not a problem because it uses water with a high surface tension as a refrigerant, but the high-temperature PEMFC stack uses oil with a high boiling point as a refrigerant, so it is separated from different materials due to the high temperature and low surface tension of the oil. There was a problem in that performance was greatly deteriorated because oil penetrated into the inside of the plate itself and soaked. However, as shown in the embodiment, if each of the separators constituting the cell unit 12 is provided with an external manifold type cooling method so as not to include a refrigerant channel, and using an independent cooling plate made of a metal material having high mechanical strength, The possibility of breakage can be significantly lowered, and even if it breaks, the refrigerant can be prevented from directly flowing into the separator, so that durability can be significantly improved.

On the other hand, when the cooling plates 131 and 134 and the cell unit 12 are made of different materials, as compared with the case of being made of the same material, since the contact resistance between both surfaces is large, in order to reduce the contact resistance , A buffer layer may be inserted between the cooling plates 131 and 134 and the cell unit 12. That is, the high-temperature PEMFC stack 10 according to the embodiment, the first independent cooling plate 131 and the first buffer layer disposed between the upper surface of the cell unit 12, the second independent cooling plate 134 and the cell A second buffer layer disposed between the lower surfaces of the unit 12 may be further included. Here, the first buffer layer and the second buffer layer may be made of a material having high conductivity and flexibility.

For example, the buffer layer may be formed of one material selected from the group consisting of a gas diffusion layer (GDL), a gas diffusion layer (GDL) on which a microporous layer (MPL) is stacked, a graphene and a metal foam.

The gas diffusion layer (GDL) may be formed of a porous carbon substrate such as carbon paper or carbon cloth made of carbon fibers. The gas diffusion layer has excellent electrical conductivity and pore structure, so that contact resistance with the separator can be reduced.

In addition, the gas diffusion layer may be prepared in a form of laminating a dry porous microporous layer (MPL) after applying a slurry made of conductive carbon particles having a micron size. Through this, conductivity can be improved.

The grafoil is a conductive sealing material made of carbon.

The metal foam is, for example, a bulky member composed of a thin wire made of a metal material, and refers to an elastic conductive product.

The first independent cooling plate 131 is connected to the first refrigerant inlet passage 132 and the first refrigerant discharge passage 133, respectively, and is in communication with a refrigerant channel formed inside the first independent cooling plate 131. One refrigerant inlet port 1312 and a first refrigerant outlet port 1313 may be included. The refrigerant flowing through one first refrigerant inlet passage 132 is branched into each of the first refrigerant inlet ports 1312 formed in the plurality of first independent cooling plates 131, and each of the first independent cooling plates The heat generated in the cell unit 12 may be removed while flowing inside 131, and discharged to one first refrigerant discharge passage 133 through each first refrigerant discharge port 1313.

The first stand-alone cooling plate 131 may include, for example, a first protrusion that does not overlap with the cell unit 12 based on the stacking direction of the cell unit 12. In addition, the first refrigerant inlet port 1312 and the first refrigerant discharge port 1313 may be formed in the first protrusion.

The second independent cooling plate 134 is connected to the second refrigerant inlet passage 135 and the second refrigerant discharge passage 136, respectively, and is in communication with a refrigerant channel formed inside the second independent cooling plate 134. A second refrigerant inlet port 1345 and a second refrigerant outlet port 1346 may be included. The refrigerant flowing through one second refrigerant inlet passage 135 is branched into each second refrigerant inlet port 1345 formed in the plurality of second independent cooling plates 134, and each of the second independent cooling plates The heat generated in the cell unit 12 may be removed while flowing inside 134 and discharged into one second refrigerant discharge passage 136 through each second refrigerant discharge port 1346.

The second stand-alone cooling plate 134 may include, for example, a second protrusion that does not overlap with the cell unit 12 based on the stacking direction of the cell unit 12. In addition, the second refrigerant inlet port 1345 and the second refrigerant discharge port 1346 may be formed in the second protrusion. Meanwhile, the second protrusion may not overlap with the first protrusion based on the stacking direction of the cell unit 12.

The first refrigerant inflow passage 132, the first refrigerant discharge passage 133, the second refrigerant inflow passage 135, and the second refrigerant discharge passage 136 are elongated along the stacking direction of the plurality of cell units 12. Can be deployed. The second refrigerant inflow passage 135 and the second refrigerant discharge passage 136 may be disposed on opposite sides of the first refrigerant inflow passage 132 and the first refrigerant discharge passage 133.

According to the four external manifold-type cooling structures as described above, the cell units 12 can be cooled while the refrigerant flows in the zigzag form from opposite sides of each other. In addition, by providing a plurality of refrigerant inflow passages and refrigerant discharge passages, respectively, it is possible to improve the fluidity of the refrigerant, compared to the case where the refrigerant inflow passage and the refrigerant discharge passage are each one. It has been exemplified that there are two or more refrigerant inflow passages and refrigerant discharge passages, respectively, but it is revealed that cases of three or more refrigerants are also included in the scope of the present invention.

8 is a view showing the surface of the cathode channel of the separator according to the embodiment, and FIG. 9 is a view showing the surface of the anode channel of the separator according to the embodiment.

8 and 9, the separation plate S according to the embodiment may include a first surface (S1, cathode channel side surface) and a second surface (S2, anode channel side surface). 8 and 9, air and hydrogen may be flowed to the first surface S1 and the second surface S2, respectively. However, this is only an example, and as illustrated, hydrogen flows to the first surface S1 and air flows to the second surface S2. The gas of either air or hydrogen may be referred to as the “first reaction gas”, and the other gas may be referred to as the “second reaction gas”.

The first surface S1 includes a first inlet portion 21 for receiving a first reaction gas, a first discharge portion 22 for discharging the first reaction gas, a first inlet portion 21 and a first The first reaction surface 23 positioned between the discharge parts 22, the first branch part 24 positioned between the first inflow part 21 and the first reaction surface 23, and the first reaction surface It may include a first confluence portion 25 located between the 23 and the first discharge portion (22).

The first reaction surface 23 may include a plurality of first straight channels 231b through which the first reaction gas flows (see FIG. 10A). According to the structure of the straight channel 231b, the differential pressure of the fuel cell stack can be kept low. In addition, the reaction gas can be uniformly flowed to the straight channel 231b on the far side from the central portion through the protrusion structure formed in the first branch portion 24 and the first confluence portion 25 as described later. In addition, the driving temperature of the high-temperature polymer electrolyte membrane fuel cell is 100 degrees or more, so that water generated in the channel evaporates, so that a blocking phenomenon, which is a disadvantage of the straight channel 231b, does not occur. Therefore, according to the embodiment, not only the structure in which the length of the entire separation plate S is elongated along the length direction of the straight channel 231b, but also the reaction gas is uniform even when the entire separation plate S has a structure having a square ratio. It has the advantage of being able to flow smoothly.

The first branch portion 24 has a plurality of first branch-side protrusions 241a, 242a, 243a, and FIG. 10A each having a long shape in a direction orthogonal to the first straight channel 231b of the first reaction surface 23 Reference), it is possible to uniformly branch the first reaction gas from the first inlet 21 to a plurality of first straight channels (231b).

The first confluence unit 25 includes a plurality of first confluence-side protrusions each having a long shape in a direction orthogonal to the first straight channel of the first reaction surface 23, and the first reaction gas is a plurality of agents. It can be uniformly joined from the 1st straight channel 231b to the 1st discharge part 22. As a result, the plurality of protrusion structures formed in the first confluence portion 25 may help the first reaction gas to flow uniformly on the first reaction surface 23. The first confluence portion 25 may have a shape symmetrical to the first branch portion 24 with respect to the first reaction surface 23. The first branch-side protrusions 241a, 242a, and 243a and the first confluence-side protrusion may be collectively referred to as a "first protrusion". In other words, the plurality of first protrusions may be formed at the inlet part and / or the outlet part of the first straight channel 231b. Hereinafter, the description of the first branch portion 24 may be applied to the first confluence portion 25 as long as there is no objection to the contrary, and a duplicate description will be omitted.

The second surface (S2), like the first surface (S1), the second inlet 31 for receiving the second reaction gas, the second discharge unit 32 for discharging the second reaction gas, and the second 2 A second reaction surface 33 positioned between the inlet part 31 and the second discharge part 32, and a second branch part positioned between the second inlet part 31 and the second reaction surface 33 34 and a second confluence portion 35 positioned between the second reaction surface 33 and the second discharge portion 32.

The second reaction surface 33 is located on a surface opposite to the first reaction surface 23 and may include a plurality of second straight channels 331b (see FIG. 11A) through which the second reaction gas flows. The second straight channel 331b may be parallel to the first straight channel 231b.

The second branch portion 34 and the second confluence portion 25 have a plurality of second branch-side protrusions 341a, 342a, 343a, and FIG. 11A having a long shape in a direction orthogonal to the second straight channel 331b. And a second confluence-side protrusion. The second branch-side protrusions 341a, 342a, and 343a and the second confluence-side protrusion may be collectively referred to as a "second protrusion". In other words, the plurality of second protrusions may be formed at the inlet part and / or the outlet part of the second straight channel 331b.

Description of the first surface (S1) can be applied to the second surface (S2) as long as there is no objection to the contrary, duplicate description will be omitted.

FIG. 10A is a partially enlarged view of FIG. 8, and FIG. 10B is a cross-sectional view taken along line I-I of FIG. 10A.

10A and 10B, the first inlet portion 21 may include a first inlet side protrusion 211a and a first inlet side groove 211b. The first inlet side protrusion 211a may allow the first reaction gas introduced into the first inlet port C_in to be divided into a plurality of forks and flow to the first branch portion 24.

The first branch portion 24 may include a plurality of protrusions 241a, 242a, and 243a, a plurality of grooves 241b, 242b, and 243b, and a plurality of gaps 246, 247, and 248.

The first port-side protrusion 241a may be formed adjacent to the first inlet portion 21 based on the longitudinal direction of the first straight channel 231b. The plurality of first port-side protrusions 241a may be spaced apart in a line along a direction perpendicular to the longitudinal direction of the first straight channel 231b to form a plurality of first port-side gaps 246. As shown in FIG. 10A, the length of the plurality of first port-side protrusions 241a increases as the distance from the center of the first inlet portion 21 becomes perpendicular to the longitudinal direction of the first straight channel 231b. Can decrease.

According to this structure, it is possible to prevent the first reaction gas from being introduced into the first straight channel 231b located closer to the first inlet 21. For example, through such a protruding structure, it is possible to design approximately the same distance from the first inlet 21 to all the first straight channels 231b. In other words, as the first straight channel 231b is positioned closer to the first inlet 21, the flow path from the first inlet 21 to the corresponding first straight channel 231b is increased, resulting in The flow rate of the first reaction gas flowing into all the first straight channels 231b can be made uniform.

Meanwhile, as illustrated in FIG. 10A, the widths of the plurality of first port-side gaps 246 may be distant from the center of the first inlet 21 in a direction perpendicular to the longitudinal direction of the first straight channel 231b. May decrease. According to this structure, it is possible to increase the pressure of the first reaction gas flowing into the first straight channel 231b positioned relatively far from the first inlet 21. Therefore, it is possible to prevent a problem in which the first reaction gas stagnates in the outer channel due to the imbalance of the differential pressure between the first inlet portion 21 and the first discharge portion 22.

The first channel-side protrusion 243a may be formed closer to the first reaction surface 23 than the first port-side protrusion 241a based on the longitudinal direction of the first straight channel 231b. The plurality of first channel-side protrusions 243a may be spaced apart in a line along a direction perpendicular to the longitudinal direction of the first straight channel 231b to form a plurality of first channel-side gaps 248. Here, the length of each of the plurality of first channel-side protrusions 243a may be shorter than the length of the first port-side protrusion 241a closest thereto. Further, the width of the plurality of first channel side gaps 248 may be constant. According to such a structure, the first reaction gas can be uniformly flowed on the first reaction surface 23.

The first intermediate-side protrusion 242a may be formed between the plurality of first port-side protrusions 241a and the plurality of first channel-side protrusions 243a based on the longitudinal direction of the first straight channel 231b. . The plurality of first intermediate side protrusions 242a may be spaced apart in a line along a direction perpendicular to the longitudinal direction of the first straight channel 231b to form a plurality of first intermediate side gaps 247. Here, the length of each of the plurality of first intermediate side protrusions 242a may be shorter than the length of the first port side protrusions 241a adjacent thereto.

The plurality of first middle side protrusions 242a are divided into a first main middle side protrusion 2421 and a first sub middle side protrusion 2422 according to a relative positional relationship with the plurality of first port side protrusions 241a. can do.

The first main intermediate-side protrusion 2421 may completely overlap the first port-side gap 246 that is closest when viewed in the longitudinal direction of the first straight channel 231b. In other words, both ends of the first main middle-side protrusion 2421 may be located outside the both ends of the first port-side gap 246 closest thereto.

The first sub-middle-side protrusion 2422 may completely overlap the adjacent first port-side protrusion 241a when viewed in the longitudinal direction of the first straight channel 231b. In other words, both ends of the first sub-intermediate protrusion 2422 may be located inside each end of the first port-side protrusion 241a closest thereto. For example, the length of the first sub middle side protrusion 2422 may be shorter than the length of the first main middle side protrusion 2421.

On the other hand, when there is a first intermediate-side protrusion 242a, a plurality of first channel-side protrusions 243a, according to a relative positional relationship with the first intermediate-side protrusion 242a, the first main channel-side protrusion 2243 And a first sub-channel-side protrusion 2432.

The first main channel-side protrusion 2431 may completely overlap the first intermediate side gap 247 when viewed in the longitudinal direction of the first straight channel 231b. In other words, both ends of the first main channel-side protrusion 2431 may be located outside the both ends of the first intermediate-side gap 247, which are closest to each other.

The first sub-channel-side protrusion 2432 may completely overlap the adjacent first intermediate-side protrusion 242a when viewed in the longitudinal direction of the first straight channel 231b. In other words, both ends of the first sub-channel-side protrusion 2432 may be located inside each end of the first intermediate-side protrusion 242a closest thereto. For example, when looking in the longitudinal direction of the first straight channel 231b, at least two or more first sub-channels of the first middle side protrusion 242a of the plurality of first middle side protrusions 242a Side projections 2432 may overlap.

The number of the plurality of first port-side gaps 246, the plurality of first intermediate-side gaps 247, and the plurality of first channel-side gaps 248 is the first reaction surface 23 from the first inlet 21 It may increase sequentially toward. Also, the width of each of the plurality of first intermediate-side gaps 247 may be smaller than the width of the first port-side gap 246 closest thereto and larger than the width of the first channel-side gap 248 closest thereto. have. According to this structure, as the number of branches of the first reaction gas flowing from the first inlet 21 toward the first reaction surface 23 is sequentially increased, the plurality of first straight channels 231b ) Allows the first reaction gas to flow uniformly.

Similarly, the first confluence unit 25 (see FIG. 8) includes a plurality of first port-side gaps, a plurality of first intermediate-side gaps, and a plurality of first channel-side gaps called the first branch portion 24. It may include, and a detailed description thereof will be omitted.

FIG. 11A is a partially enlarged view of FIG. 9, and FIG. 11B is a cross-sectional view taken along line II-II of FIG. 11A.

11A and 11B, the plurality of second straight channels 331b do not overlap with the plurality of first straight channels 231b (see FIGS. 10A and 10B) in the thickness direction of the separation plate S. Can be formed. Further, the plurality of protrusions formed in the second branch portion 34 are formed so as not to overlap each other with the plurality of protrusions formed in the first branch portions 24 (see FIGS. 10A and 10B) in the thickness direction of the separating plate S. Can be. According to such a structure, a separation plate can be formed through a simple process of pressing using one thin plate material.

The second inlet 31 may include a second inlet side protrusion 311a and a second inlet side groove 311b. The second inlet side protrusion 311a may allow the second reaction gas flowing into the second inlet port A_in to be divided into a plurality of forks and flow to the second branch portion 34. Here, the second inlet side protrusion 311a may be formed on the opposite surface of the first inlet side groove 211b (see FIGS. 10A and 10B). Similarly, the second inlet side groove 311b may be formed on the opposite surface of the first inlet side protrusion 211a.

The second branch portion 34 may include a plurality of protrusions 341a, 342a, and 343a, a plurality of grooves 341b, 342b, and 343b, and a plurality of gaps 346, 347, and 348.

The plurality of protrusions 341a, 342a, and 343a are (i) formed on opposite surfaces of the first port-side grooves 241b, 10a and 10b, and are perpendicular to the longitudinal direction of the second straight channel 331b. A second port-side protrusion 341a spaced in a line to form a plurality of second port-side gaps 346, and (ii) the opposite of the first intermediate-side grooves 242b (see FIGS. 10A and 10B). A second intermediate-side protrusion 342a formed on the surface and spaced apart in a line along a direction perpendicular to the longitudinal direction of the second straight channel 331b to form a plurality of second intermediate-side gaps 347, and (iii) ) Formed on opposite surfaces of the first channel-side grooves 243b (see FIGS. 10A and 10B) and spaced apart in a line along a direction perpendicular to the longitudinal direction of the second straight channel 331b, a plurality of second channel-side gaps A second channel-side protrusion 343a forming 348 may be included.

The plurality of grooves 341b, 342b, and 343b include (i) a second port-side groove 341b formed on the opposite surface of the first port-side protrusion 241a (see FIGS. 10A and 10B), and (ii) 1 The second intermediate side groove 342b formed on the opposite side of the middle side protrusion (242a, see FIGS. 10A and 10B), and (iii) the opposite side of the first channel side protrusion 243a (see FIGS. 10A and 10B). It may include a first channel-side groove 343b formed on the surface.

On the other hand, when the first reaction gas is air, and the second reaction gas is hydrogen, the width of the plurality of first straight channels 231b through which the air flows is equal to that of the plurality of second straight channels 331b through which the hydrogen flows. It can be formed larger than the width. According to such a structure, since the flow rate of air can be increased, the reaction efficiency of oxygen (O2) and hydrogen (H2) can be improved, and as a result, the efficiency of the fuel cell stack can be improved.

On the other hand, when the first reaction gas is air, and the second reaction gas is hydrogen, a plurality of first branch portions 24 (see FIGS. 10A and 10B) from the first inlets 21 (see FIGS. 10A and 10B). The distance from the second protrusions 241a, 242a, and 243a to the closest first port-side protrusion 241a is the plurality of protrusions 341a, 342a, 343a of the second branch 34 from the second inlet 31. It may be closer than the distance to the nearest second port-side protrusion 341a. According to this structure, when supplying air having a relatively large flow rate than hydrogen, the air is not sufficiently distributed at the inlet side of the first branch portion 24 through which a large flow rate flows, so that the plurality of first straight channels 231b It can effectively reduce the problem of entering the middle.

12 is a flowchart illustrating a method of manufacturing a separator according to an embodiment, and FIG. 13 is a flowchart illustrating a pressing step according to an embodiment.

Referring to FIG. 12, a method of manufacturing a separation plate S according to an embodiment may include preparing a thin plate (S110) and pressing (S120).

The step of preparing the thin plate (S110) may be performed using, for example, a composite carbon material having conductivity formed by impregnating an epoxy-based resin with a carbon material. For example, the composite carbon material may be a carbon graphite composite impregnated with an epoxy-based resin. In general, when a carbon material is used, it is known that even if the processability is improved to a certain extent by impregnating an epoxy-based resin, it is known that a separation plate cannot be formed through a pressing process. Therefore, forming a separator through a pressing process was limited to metal materials. However, in the case of the separation plate having a simple shape as shown in FIGS. 8 to 11B, it is possible to manufacture only the pressing process using the above-described composite carbon material. Therefore, the separator according to the embodiment can be easily manufactured, but unlike the separator made of a metal material, it has an advantage that it is not easily corroded in a high-temperature operating environment.

The pressing (S120) may include forming a reaction surface (S121) and forming a protrusion (S122) in the center of the thin plate.

The forming of the reaction surface (S121) includes forming a first reaction surface 23 including a plurality of parallel first straight channels 231b, and opposite surfaces of the first reaction surface 23, And forming a second reaction surface 33 including a plurality of parallel second straight channels 331b.

The step of forming the protrusion (S122) is to form a plurality of first protrusions having a long shape in a direction orthogonal to the first linear channel 231b at the inlet or outlet of the plurality of first straight channels 231b. The method may include forming a plurality of second protrusions having a long shape in a direction orthogonal to the second straight channel 331b at the inlet or outlet of the plurality of second straight channels 331b.

Meanwhile, the one illustrated in FIG. 13 is only an example, and the order of steps S121 and S122 is not limited. For example, steps S121 and S122 may be performed simultaneously.

For example, the plurality of first straight channels 231b and the plurality of second protrusions 341a, 342a, and 343a may be simultaneously formed by pressing the prepared thin plate in one direction.

For example, the plurality of second straight channels 331b and the plurality of first protrusions 241a, 242a, and 243a may include a plurality of first straight channels 231b and a plurality of second protrusions 341a, 342a, and 343a. And the like), the prepared thin plates may be formed simultaneously by pressing in the opposite direction of the one direction.

Furthermore, by simultaneously pressing the prepared thin plates in both directions, the first straight channel 231b, the second straight channel 331b, the first projections 241a, 242a, 243a, etc., and the second projections 341a, 342a, 343a, etc. It turns out that it is also possible to form all of them simultaneously.

As described above, although the embodiments have been described by the limited drawings, those skilled in the art can apply various technical modifications and variations based on the above. For example, the described techniques are performed in a different order than the described method, and / or the components of the described system, structure, device, circuit, etc. are combined or combined in a different form from the described method, or other components Alternatively, even if replaced or substituted by equivalents, appropriate results can be achieved.

Claims (20)

The first inlet receiving the first reaction gas, the first discharge part for discharging the first reaction gas, the first reaction surface positioned between the first inlet part and the first discharge part, and the second reaction gas A separator for a high temperature polymer electrolyte membrane fuel cell comprising a second inlet to receive, a second outlet to discharge a second reaction gas, and a second reaction surface positioned between the second inlet and the second outlet. In,
The first reaction surface includes a plurality of first straight channels through which the first reaction gas flows,
Between the first inlet and the first reaction surface, through the plurality of protrusions each having an elongated shape in a direction orthogonal to the first straight channel, the first reactant gas is discharged from the first inlet to the plurality of agents. 1, a first branch portion is arranged to branch uniformly into a straight channel,
The second reaction surface is parallel to the plurality of first straight channels, and includes a plurality of second straight channels through which the second reaction gas flows,
Between the second inlet and the second reaction surface, through the plurality of protrusions each having an elongated shape in a direction orthogonal to the second straight channel, the second reactant gas is removed from the second inlet through the plurality of agents. 2 A second branching part that is uniformly branched with a straight channel is arranged,
The plurality of first straight channels and the plurality of second straight channels do not overlap each other in the thickness direction of the separation plate,
The plurality of protrusions of the first branch portion and the plurality of protrusions of the second branch portion do not overlap with each other in the thickness direction of the separation plate.
According to claim 1,
The first branch,
A plurality of first port-shaped gaps are formed adjacent to the first inlet part based on the lengthwise direction of the first straight channel and are spaced apart in a direction perpendicular to the longitudinal direction of the first straight channel. A first port side projection; And
A plurality of first channels are formed adjacent to the first reaction surface, and spaced apart in a direction perpendicular to the lengthwise direction of the first linear channel, based on the longitudinal direction of the first linear channel. And a plurality of first channel side protrusions forming a side gap,
A separator for a high temperature polymer electrolyte membrane fuel cell, wherein each of the plurality of first channel-side protrusions is shorter than the length of the first port-side protrusion nearest thereto.
According to claim 2,
A separator for a high temperature polymer electrolyte membrane fuel cell, wherein the width of the plurality of first channel side gaps is constant.
According to claim 2,
The length of the plurality of first port-side protrusions, the separation plate for a high-temperature polymer electrolyte membrane fuel cell characterized in that it decreases as it moves away from the center of the first inlet portion in a direction perpendicular to the lengthwise direction of the first straight channel.
According to claim 2,
The width of the plurality of first port-side gaps, the separation plate for a high-temperature polymer electrolyte membrane fuel cell, characterized in that the distance away from the center of the first inlet portion in a direction perpendicular to the longitudinal direction of the first straight channel.
According to claim 2,
The first branch,
It is formed between the plurality of first port-side protrusions and the plurality of first channel-side protrusions based on the longitudinal direction of the first linear channel, and is spaced apart in a direction perpendicular to the longitudinal direction of the first linear channel. Further comprising a plurality of first intermediate side protrusions forming the first intermediate side gaps,
A separator for a high temperature polymer electrolyte membrane fuel cell, wherein each of the plurality of first intermediate-side protrusions is shorter than the length of the first port-side protrusion adjacent thereto.
The method of claim 6,
The number of the plurality of first port-side gaps, the plurality of first intermediate-side gaps, and the plurality of first channel-side gaps increases sequentially from the first inlet toward the first reaction surface. Separator for polymer electrolyte membrane fuel cells.
The method of claim 6,
Separation for the high-temperature polymer electrolyte membrane fuel cell, characterized in that each width of the plurality of first intermediate-side gaps is smaller than the width of the first port-side gap nearest thereto and larger than the width of the first channel-side gap adjacent thereto. plate.
The method of claim 6,
The plurality of first intermediate side projections,
A first main middle side protrusion completely overlapping the first port side gap closest when viewed in the longitudinal direction of the first straight channel; And
And a first sub-middle side protrusion completely overlapping the adjacent first port side protrusion when viewed in the longitudinal direction of the first straight channel,
Separator for a high temperature polymer electrolyte membrane fuel cell, characterized in that the length of the first sub-middle side protrusion is shorter than the length of the first main middle-side protrusion.
The method of claim 6,
The plurality of first channel-side protrusions,
A first main channel side protrusion completely overlapping the first intermediate side gap closest when viewed in the longitudinal direction of the first straight channel; And
A separator for a high-temperature polymer electrolyte membrane fuel cell including a first sub-channel-side protrusion that completely overlaps an adjacent first intermediate-side protrusion when viewed in the longitudinal direction of the first straight channel.
◈ Claim 11 was abandoned when payment of the set registration fee was made.◈ The method of claim 10,
When viewed in the longitudinal direction of the first straight channel, a high temperature polymer, characterized in that at least two or more first sub-channel-side protrusions overlap with any one of the plurality of first intermediate-side protrusions. Separator for electrolyte membrane fuel cells.
◈ Claim 12 was abandoned when payment of the set registration fee was made.◈ According to claim 1,
The first inlet,
A separator for a high temperature polymer electrolyte membrane fuel cell, comprising a plurality of first inlet projections for dividing the first reaction gas into a plurality of forks to flow to the first branch.
delete According to claim 1,
The first reaction gas is air, and the second reaction gas is hydrogen,
The width of the plurality of first straight channels through which the air flows is larger than the width of the plurality of second straight channels through which the hydrogen flows.
◈ Claim 15 was abandoned when payment of the set registration fee was made.◈ According to claim 1,
The first reaction gas is air, and the second reaction gas is hydrogen,
The distance from the first inlet portion to the closest protrusion among the plurality of protrusions of the first branch portion is closer than the distance from the second inlet portion to the closest protrusion among the plurality of protrusions of the second branch portion. Separator for high temperature polymer electrolyte membrane fuel cell.
A plurality of cell units including a plurality of separator plates and a plurality of membrane electrode assemblies respectively disposed between the plurality of separator plates; And
And a cooling assembly including a plurality of first independent cooling plates disposed on upper surfaces of the plurality of cell units, and a plurality of second independent cooling plates disposed on lower surfaces of the plurality of cell units, respectively.
Each of the plurality of separation plates,
A first reaction surface having a plurality of first straight channels;
A second reaction surface located on the opposite side to the first reaction surface and having a plurality of second straight channels;
It is formed on the inlet or outlet of the plurality of first linear channels so that a first reaction gas flows uniformly to the plurality of first linear channels, and has a plurality of elongated shapes in a direction orthogonal to the first linear channel. First projection; And
It is formed on the inlet or outlet of the plurality of second straight channels so that a second reaction gas flows uniformly to the plurality of second straight channels, and a plurality of shapes having a long shape in a direction orthogonal to the second straight channels. Includes a second projection,
The plurality of first straight channels and the plurality of second straight channels do not overlap each other in the thickness direction of the separation plate,
The high temperature polymer electrolyte membrane fuel cell stack, characterized in that the plurality of first protrusions and the plurality of second protrusions do not overlap with each other in the thickness direction of the separation plate.
Preparing a thin plate;
Forming a first reaction surface including a plurality of parallel first straight channels in a central portion of the thin plate;
A plurality of first having a long shape in a direction orthogonal to the first linear channel at an inlet or an outlet of the plurality of first linear channels so that a first reaction gas flows uniformly to the plurality of first linear channels. Forming a projection;
Forming a second reaction surface including a plurality of parallel second straight channels on a surface opposite to the first reaction surface; And
A plurality of second having a long shape in a direction orthogonal to the second linear channel at the inlet or outlet of the plurality of second linear channels so that a second reaction gas flows uniformly to the plurality of second linear channels. Forming a protrusion,
The plurality of first straight channels and the plurality of second straight channels do not overlap each other in the thickness direction of the thin plate,
A method of manufacturing a separator for a high temperature polymer electrolyte membrane fuel cell, wherein the plurality of first protrusions and the plurality of second protrusions do not overlap each other in the thickness direction of the thin plate.
delete The method of claim 17,
The plurality of first straight channels and the plurality of second protrusions are formed simultaneously by pressing the thin plate in one direction,
The plurality of second straight channels and the plurality of first protrusions are simultaneously pressed by pressing the thin plate in the opposite direction of the one direction at positions not overlapping each other with the plurality of first linear channels and the plurality of second protrusions. Method for manufacturing a separator for a high temperature polymer electrolyte membrane fuel cell, characterized in that formed.
The method of claim 17,
The step of preparing the thin plate,
Method for manufacturing a high-temperature polymer electrolyte membrane fuel cell separator, characterized by using a composite carbon material having conductivity formed by impregnating an epoxy-based resin with a carbon material.

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